From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 10 Dec 2009 00:53:21 +0000 (+0000)
Subject: signals: Fix more rcu assumptions
X-Git-Tag: v2.6.33-rc2~49^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7cf7db8df0b78076eafa4ead47559344ca7b7a43;p=pandora-kernel.git

signals: Fix more rcu assumptions

1) Remove the misleading comment in __sigqueue_alloc() which claims
   that holding a spinlock is equivalent to rcu_read_lock().

2) Add a rcu_read_lock/unlock around the __task_cred() access
   in __sigqueue_alloc()

This needs to be revisited to remove the remaining users of
read_lock(&tasklist_lock) but that's outside the scope of this patch.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <20091210004703.269843657@linutronix.de>
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